Texas Instruments TMS320F28035PNS

Overview

TMS320F28035PNS from Texas Instruments is a 32-bit real-time microcontroller featuring a 60MHz C28x CPU, integrated Control Law Accelerator (CLA), 64KB on-chip flash, 10KB SARAM, and high-resolution PWM (HRPWM) for closed-loop motor and power control. It operates from a single 3.3V supply, includes an on-chip voltage regulator, and targets industrial inverter, EV charging, and solar power conversion systems.

For engineers reviewing the TMS320F28035PNS datasheet, TMS320F28035PNS pinout, TMS320F28035PNS application, or TMS320F28035PNS equivalent, key selection criteria include CLA co-processing capability, 14 ePWM channels with HRPWM support, 16-channel 12-bit ADC at 4.6 MSPS, dual-sample-and-hold, and LQFP-80 package compatibility with industrial temperature range (–40°C to 105°C).

Technical Context

The TMS320F28035PNS implements a Harvard-architecture C28x CPU with atomic operations and fast interrupt response, paired with a dedicated 32-bit floating-point CLA that executes control algorithms independently of the main CPU. Its memory subsystem includes 64KB flash (secure), 10KB SARAM (CLA-accessible), 8KB boot ROM, and 1KB OTP.

Peripheral integration centers on real-time actuation: 14 ePWM channels (7 with HRPWM), 3 eCAP modules, 1 eQEP, 16-channel 12-bit ADC with dual sample-and-hold and internal VREFHI/VREFLO references, 3 comparators with DACs, and serial interfaces including eCAN, LIN, I²C, SPI (2), and SCI (1).

Key Specifications

Pinout & Package

Package: PN (LQFP-80), 12.0 mm × 12.0 mm body, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar real-time control applications.

Compared with TMS320F28034PN, the TMS320F28035PNS adds CLA-based computational offload and doubled flash capacity-critical for complex FOC and grid-synchronization algorithms-while TMS320F28035-Q1PN provides identical real-time performance plus automotive qualification for safety-relevant deployments.

Availability

TMS320F28035PNS is available at Aetrix Electronics and suitable for industrial motor drives, solar power optimizers, and EV on-board charger designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TMS320F28035PNS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in industrial, automotive, and power electronics.

The TMS320F2803x family delivers entry-level real-time control performance for cost-sensitive, high-volume applications like motor drives and digital power, emphasizing analog integration, single-supply operation, and CLA-accelerated control loops.

FAQ

What is the maximum operating frequency of the TMS320F28035PNS CPU core?

The TMS320F28035PNS features a TMS320C28x 32-bit CPU core rated for 60 MHz operation, corresponding to a 16.67 ns instruction cycle time. This frequency is achieved using the on-chip PLL with internal or external clock sources, and all peripherals-including ADC, ePWM, and CLA-are fully synchronized to this clock domain. The TMS320F28035PNS maintains timing integrity across its entire peripheral set at this speed.

Does the TMS320F28035PNS include a hardware accelerator for control law execution?

Yes, the TMS320F28035PNS integrates a dedicated Control Law Accelerator (CLA), a 32-bit floating-point co-processor that executes control algorithms independently of the main C28x CPU. This allows concurrent execution of high-priority real-time tasks-such as field-oriented control or resonant converter modulation-without CPU intervention, reducing loop latency and improving determinism. The CLA is accessible only on the TMS320F28033 and TMS320F28035 variants within the F2803x family.

What package type and pin count does the TMS320F28035PNS use?

The TMS320F28035PNS uses an 80-pin Low-Profile Quad Flatpack (LQFP) package designated "PN", with 12.0 mm × 12.0 mm body dimensions and 0.5 mm lead pitch. This package supports 45 GPIO pins (multiplexed with peripherals), full JTAG debug access, and thermal performance suitable for industrial ambient temperatures up to 105°C. Pin assignments match other F2803x devices in the PN variant, ensuring layout compatibility across the family.

How much on-chip flash memory does the TMS320F28035PNS provide, and is it secured?

The TMS320F28035PNS includes 64KB of on-chip flash memory organized as 64K × 16-bit words. This flash is protected by TI's Code Security Module, which supports 128-bit encryption keys, lock bits per memory block (flash, SARAM, OTP), and secure boot from ROM. Once locked, flash contents cannot be read or modified externally, preventing firmware reverse engineering-a critical feature for proprietary motor control or power conversion algorithms deployed in the TMS320F28035PNS.

Which analog peripherals are integrated into the TMS320F28035PNS for real-time control?

The TMS320F28035PNS integrates a 16-channel 12-bit ADC with 4.6 MSPS sampling rate and 216.67 ns conversion time, dual sample-and-hold for simultaneous sampling, on-chip temperature sensor, three analog comparators with integrated 10-bit DACs, and ratio-metric VREFHI/VREFLO references. These peripherals directly interface with ePWM modules-enabling comparator-triggered trip-zone protection and ADC-initiated PWM updates-eliminating external analog signal conditioning in motor and power applications using the TMS320F28035PNS.